fs/ntfs3: handle delayed allocation overlap in run lookup

fs/ntfs3: handle delayed allocation overlap in run lookup

Introduce run_lookup_entry_da() to look up data runs while taking
delayed allocation into account.

ntfs3 may have both committed extents and delayed allocation extents for
the same VCN range.  The new helper checks delayed allocation first and
falls back to the real run, then corrects the returned range when a real
run overlaps with a delayed allocation run.

Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com>